Performance analysis of DRX power saving technique for LTE based UE under bursty Web traffic

Abstract

The growth of smart mobile phone applications are multifold every day. Each application is developed with the goal of handling high speed data rate with reliable transmission and reception. Long Term Evolution (LTE) network is the promising solution to support such a high data rate applications with an IP addressing system. In converse, conserving energy in User Equipment (UE) battery to meet those requirements is a challenging task. Web based applications makes UE to consume more power which limits further usage. Several power saving techniques are available to save power by either increasing or decreasing various parameters in Discontinuous Reception and Transmission (DRX/DTX) mechanism. Though the enhanced 3GPP standard provides a power saving DRX/DTX scheme, an optimized method is to be adopted to adjust the DRX parameters. Analysing the power saving techniques by assigning a DRX cycle to sustain the sleep mode or not entering into sleep mode is a challenging task. A new approach is developed by considering some of the energy overhead parameters and timer durations in the DRX mechanism, which makes the UE not to switch immediately from light sleep mode to Deep sleep mode under bursty web traffic. In this paper, the performance analysis of LTE networks using DRX power saving method is studied for bursty web traffic model and the simulation result shows that the lower number of short DRX cycle improves the power savings in UE. The simulation analysis is done by using MATLAB.